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From "Andrew Wang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5810) Unify mmap cache and short-circuit file descriptor cache
Date Wed, 12 Feb 2014 03:46:21 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5810?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13898745#comment-13898745
] 

Andrew Wang commented on HDFS-5810:
-----------------------------------

+1 pending Jenkins. thanks for putting up with all my review comments :)

> Unify mmap cache and short-circuit file descriptor cache
> --------------------------------------------------------
>
>                 Key: HDFS-5810
>                 URL: https://issues.apache.org/jira/browse/HDFS-5810
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: hdfs-client
>    Affects Versions: 2.3.0
>            Reporter: Colin Patrick McCabe
>            Assignee: Colin Patrick McCabe
>         Attachments: HDFS-5810.001.patch, HDFS-5810.004.patch, HDFS-5810.006.patch, HDFS-5810.008.patch,
HDFS-5810.015.patch, HDFS-5810.016.patch, HDFS-5810.018.patch, HDFS-5810.019.patch, HDFS-5810.020.patch,
HDFS-5810.021.patch, HDFS-5810.022.patch
>
>
> We should unify the client mmap cache and the client file descriptor cache.  Since mmaps
are granted corresponding to file descriptors in the cache (currently FileInputStreamCache),
they have to be tracked together to do "smarter" things like HDFS-5182.



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